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Penfold_6290

Member Since: 22 Sep 2021
Location: Dorset
Posts: 352

Speedo Healer - Td5 Cruise Control

Hi folks, I am looking for some advice on a Speedo Healer for my 2002 Td5 110 with cruise control. I fitted the cruise control years ago and it worked great until I recently fitted a 1.3:1 transfer box from Ashcroft and an R380 with a V8 (0.732) 5th gear ratio for slightly quieter cruising. The speedo drive gear is the blue 20 tooth item, part number FRC3310 and it runs on 265/75R16 Grabber AT2. As expected the CC now doesn't function in 5th gear (it works fine in 3rd/4th) and from reading other threads it looks like a Speedo Healer could help. However, according to a GPS speed app on my phone the speedo reads correctly so I need to fool the ECU into thinking I haven't changed the ratios without significantly changing the speedo reading.

Any advice out there please?

Thanks, Martin

22nd Sep 2021 6:48pm

ashtrans
Site Sponsor

Member Since: 08 Nov 2008
Location: Harpenden
Posts: 262

Some info here :

https://www.defender2.net/forum/topic46380.html Dave

3rd Oct 2021 10:30am

Penfold_6290

Member Since: 22 Sep 2021
Location: Dorset
Posts: 352

Thanks Dave, what confused me was I incorrectly assumed the speed transducer sent a signal to the ECU which in turn created an output for the speedo. Now I know the speedo gets its signal from the speed transducer and subsequently it send sends a signal to the ECU I can fit the Speedo Healer between the speedo and the ECU to fool it into accepting the new ratios and so render the cruise control operational again.

Cheers, Martin

3rd Oct 2021 2:49pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

3rd Oct 2021 3:31pm

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